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UBVRI photometry of G, K, M HIPPARCOS stars. II.

Jordi, C.; Figueras, F.; Torra, J. +2 more

As indicated by Grenon (1989), the data of the present series of reports on the UBVRI photometry of late-type stars in the Hipparcos Input Catalog are to be employed in computations of Hipparcos observing time, as well as in evaluating the observability of faint stars by the satellite. Attention is here given to late type stars in the V = 8-12 ran…

Optical positions of radiostars. III.

Costa, E.; Loyola, P.

Precise optical positions, relative to either the Perth 70 or the AGK3R catalog have been obtained for 44 radiostars proposed to the Hipparcos observing list. Precision levels between 0.17 and 0.28 arcsec were obtained.